Machine for the manufacture of pipes, cylinders, &amp;c.



D. S. DE LAVAUD.

MACHINE FOR THE MANUFACTURE OF PIPES, CYLINDERS, &c.

APPLICATION FILED JULYZI, I916.

Patented Apr. 24, 1917.

a machine in DIMITRI snnsmm DE LAVAUD, or she PAULO, BRAZIL.

I MACHINE FOR THE MANUFACTURE OF PIPES, CYLINDERS, 8w.

Specification of Letters Patent.

Patented Apr. 24, 1917.

Application filed July 21, 1916. Serial No. 110,485.

To all whom it may concern:

Be it known that I, DIMrrRI SENSAUD on LAVAUD, a citizen of Brazil, residing at S510 Paulo, State of Sao Paulo, Brazil, have invented new and useful Improvements in Machines for the Manufacture of Pipes, Cylinders, &c., of which the following is a specification.

My invention relates to machines for easting pipe and similar hollow bodies.

An object of my invention is to provide which the pipe is cast under centrifugal force, and at the same time is subjected to the action of a roller, which exerts a pressure upon the metal as it hardens, and serves to determine the thickness of the pipe. \nother object of my invention is to provide a machine in which the pipe as formed is moved out from the mold, so that the length of the pipe is determined, not by the size of the mold, but by the quantity of. metal poured in. A further object of the invention is to provide eiiicient means for cooling the mold. and the roller cylinder.

My invention consists in the construction, combination and arrangement of parts as herein illustrated, described and claimed.

In the accompanying drawings forming part hereof, I have illustrated a form of embodiment of my invention, in which drawings similar reference characters designate corresponding parts, and in which:

Figure 1 is a vertical longitudinal section taken approximately through the center of the mold;

Fig. 2 is a vertical transverse section taken approximately on the line 2-2 of Fig. 1, looking in the direction of the arrow;

Fig. 3 is an elevation of the machine viewed from the right hand end, as shown in Fig. 1.

Fig. 4 is a detail of a machine having a plurality of rolling cylinders.

Referring to the drawings,a shell 1 of cast provided,

iron or other suitable materlal is which carries the mold 2. The mold 2 is rotatably mounted upon ball-bearings 12, and is provided with a gear wheel 11 or other suitable means by which it is rotated. At one end of the mold is provided a pouring trough 3. At the same end of the mold 2 is disposed a changeable inwardly projecting ring or flange 2 which serves to prevent the molten metal from leaving the mold at this end, and also to determine the thickness of metal in the pipe.

A roller 4 is disposed in bearings 10, so as to have one end project within the mold 2. This roller is provided with. a gear wheel 8, or other suitable driving means; and has disposed upon its outer surface where it extends within the mold 2, a helical depression or raised portion 9. The shortest distance between the roller 9 and the interior of the mold 2, at the bottom as shown in the drawings, determines the thickness of the metal in the pipe.

In order to provide for the cooling of the mold, space is provided between the mold 2 and the shell 1, to which water is admitted through the passage 15, the water being discharged from the passage 16. The roller 1 is provided with a pipe 5 centrally located within the roller, and extending the length thereof. having at the end of the roller, adj acent the mold, openings 5 connecting the interior of the pipe 5 with the space be tween the pipe 5 and the inner surface of the roller 4. A pipe 6 projects into the open end of the pipe 5 for the purpose of supplying water thereto, and at this same end of the roller, there is a partition supporting the pipe 5, having holes 5 cut therein to allow the water to escape from the space between the pipe 5 and the inner surface of the roller '4. A casing 7 is provided to receive the water discharged from the roller 4:.

The pipe being formed is designated by the numeral 17. As this emerges from the mold, it is received by the guiding rollers 14, which are provided with helically cut surfaces similar to the surfaceof the rolling cylinder A. lwo of these rollers 14 are rotatably mounted in the base 18, and the upper roller 14: is carried on an arm 20 pivotally mounted on the base 13, and is caused to bear against the pipe by the counter weight 19.

:ln the operation of the machine, the mold 2 and the rollers are driven through their respective gears 11 and 8 in the same direction. of rotation. A quantity of metal sufiicient to make the length of pipe desired is poured into the funnel 3, and as it enters the mold it is thrown out by centrifugal force against the inner surface of the mold, and is simultaneously acted upon by the roller 4:, which serves to smooth out the inner surfaces of the pipe, and to determine the 4, serves the mold to immediately solidify. The helix 9 upon the roller 4 acts upon the pipe as it is formed, moving the same to the right, as

shown in Fig. l; the finished pipe is thus ejected.' As the pipe comes from the moldit is received upon the lower rollers 14, and

the p1 pe by the counter Weight 19. The pipe rotating in frictional contact with the rollers 14 causes them to rotate, and the helical surfaces of these rollers act upon the pipe and assist in withdrawing it from the mold. As indicated by the detail, Fig. 4, in place of the single roller 4, a plurality of rollers 4* may be used. Having now described my invention, I claim as new and desire to secure by Letters Patent:

1. In a casting machine, the combination comprising a rotary mold, and a roller disposed within said mold.

2 In amachine for casting hollow bodies, the combination comprising a rotary mold,.

a roller disposed within said mold, and means for continuously ejecting a casting as formed. a j

3. In a casting machine, the combination comprising a rotary mold, .a roller disposed Within said mold, and ejecting means formed on the outer surface of said when 4. In a casting machine, the combination comprising a rotary mold, and a roller disposed within said mold, said roller having a helical channel cut in its outer surface.

5. In a casting machine, the combination the mold 2, and

cool, and

wing, and thereon means for withdrawing the casting. the upper roller 14 is then placed over the pipe, and is caused to exert pressure upon rotating the pipe,

. frictional 'on their rollers.

, discharge ends,

.7. In a casting machine, the combination -,comprising a rotary mold, a roller disposed within said mold, means for ejecting a cast-- receiving rollers having formed 8. In apipe casting machine, means for withdrawing the pipe comprising means for. rollers in frictional contact with the pipe, and helically arranged gripping means on said rollers, whereby axial movement-is imparted to the pipe;

9. In a pipe casting. machine, meansfor withdrawlngthe pipe comprising rollers in contact with the pipe, said rollers having helically arranged gripping means surfaces, and means to rotate said 10. In a casting mac'hine,the combination comprising a rotary mold having inlet and a coacting roller disposed within said mold, means for pouring the molten metal into the inlet end of said mold,

and a removable ring disposed at said inlet end of the mold and projecting radially inward from the inner surface of the mold.

11. In a casting machine, the combination comprising a shell, a mold rotatably carried within said shell, the space between said mold and shell forming a water jacket, and a roller disposed to rotate within said mold, said roller having interior channels for the circulation of cooling water. In testimony whereof I have signed my name to this specification.

DIMITRI SEN SAUD DE LAVAUD. 

